To get a trash can, simply throw a magma cream item into any cauldron and then you have a trash can!  to delete, simply break the cauldron and place it to get your cauldron back!






summon FallingSand
~2 ~15 ~
{Time:1,Block:redstone_block,Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:fill
~ ~ ~-1 ~ ~-12 ~-1
redstone_block},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:fill
~ ~2 ~-1 ~ ~-11 ~
air},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~7 ~ ~1
{Time:1,Block:command_block,TileEntityData:{Command:execute
@e[type=ArmorStand,name=trash] ~ ~ ~ detect ~ ~ ~ air 0 kill
@e[type=ArmorStand,name=trash,r=0]}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~6 ~ ~-1
{Time:1,Block:command_block,TileEntityData:{Command:execute
@e[score_trash_min=1] ~ ~ ~ detect ~ ~ ~ cauldron 0 kill
@e[r=0,type=Item,score_trash_min=1]}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~6 ~ ~1
{Time:1,Block:command_block,TileEntityData:{Command:execute
@e[score_trash_min=1] ~ ~ ~ detect ~ ~ ~ cauldron 0 kill
@e[r=0,type=Item,score_trash_min=1]}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~5 ~ ~1
{Time:1,Block:command_block,TileEntityData:{Command:execute
@e[score_trash_min=1] ~ ~ ~ detect ~ ~ ~ cauldron 0 summon ArmorStand
~ ~-.5 ~
{Invisible:1,NoGravity:1,CustomName:"trash",Marker:1}}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~4 ~1 ~1
{Time:1,Block:command_block,TileEntityData:{Command:scoreboard
players add @e[type=Item] trash 1
{Item:{id:"minecraft:magma_cream"}}}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:scoreboard
objectives add trash
dummy},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~3 ~4 ~1
{Block:command_block,Time:1,TileEntityData:{Command:execute
@e[type=ArmorStand,name=trash] ~ ~ ~ kill
@e[type=Item,r=0]}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~2 ~4 ~1
{Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~ ~-1 ~5 ~
~-1
redstone_block}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~2 ~5 ~-1
{Block:command_block,Time:1,TileEntityData:{Command:fill ~ ~ ~1 ~5 ~
~1
air}}},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:fill
~2 ~ ~1 ~7 ~ ~-1
wool},Riding:{id:"FallingSand",Time:1,Block:command_block,TileEntityData:{Command:summon
FallingSand ~2 ~20 ~ {Block:redstone_block,Time:1}}}}}}}}}}}}}}}}